You are given the following database schema: Sailors(sid, sname, rating, age) Boats(bid, bname, color) Reserves(sid, bid, day) Consider the join on Sailors ▷◁ Reserves and assume that you have the following statistics and limitations: * You have available 9 pages in main memory. * Sailors: 100000 tuples, 1000 pages; Boats: 2000 tuples, 10 pages; Reserves: 110000 tuples, 550 pages 1. Calculate the I/O cost of this join using the Block Nested Loop algorithm? 2. Calculate the I/O cost of sorting the Sailors relation?
You are given the following database schema: Sailors(sid, sname, rating, age) Boats(bid, bname, color) Reserves(sid, bid, day) Consider the join on Sailors ▷◁ Reserves and assume that you have the following statistics and limitations: * You have available 9 pages in main memory. * Sailors: 100000 tuples, 1000 pages; Boats: 2000 tuples, 10 pages; Reserves: 110000 tuples, 550 pages 1. Calculate the I/O cost of this join using the Block Nested Loop algorithm? 2. Calculate the I/O cost of sorting the Sailors relation?
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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You are given the following
Sailors(sid, sname, rating, age)
Boats(bid, bname, color)
Reserves(sid, bid, day)
Consider the join on Sailors ▷◁ Reserves and assume that you have the following statistics and
limitations:
* You have available 9 pages in main memory.
* Sailors: 100000 tuples, 1000 pages; Boats: 2000 tuples, 10 pages; Reserves: 110000 tuples,
550 pages
1. Calculate the I/O cost of this join using the Block Nested Loop
2. Calculate the I/O cost of sorting the Sailors relation?
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